Abstract

We have measured the third-order susceptibility,
χ(3), versus concentration for a number
of molybdenum-based metal-organic complexes in solution, using independent
degenerate four-wave mixing and Z-scan techniques. Good agreement was obtained
between the degenerate four-wave mixing and Z-scan measurements. The variation
of χ(3) with concentration yielded the
second-order hyperpolarizability γ. A close correlation
was observed between the number of delocalized π
electrons and the magnitude of γ.

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